如图,将装有水的小瓶瓶口向_______(上/下),使其漂浮在大塑料瓶

如图,将装有水的小瓶瓶口向_______(上/下),使其漂浮在大塑料瓶的水面上,将大塑料瓶密封后,就制成了“浮沉子”。制作时,在小瓶中放入的水要适量,水过少了,会导致___________ 

答案

下; 手捏大瓶时,小瓶可能不能沉入水中.

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